Improvement in dredging-machine shovels



J. GANAN. Dredging-Maohine Shovel.

NQ. 218,427. Patented Aug. 12,1879.

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UNITED STATES PATENT OEEIGE.

JAMES OANAN, OF ALLANBURG, ONTARIO, CANADA.

IMPROVEMENT IN DREDGlNG-MACHINE SHOVELS.

Specification forming part of Letters Patent No. 218,427, dated August 12, 1879; application filed November 22, 1878.

To all whom it may c'oncern:

Be it known that I, JAMES CANAN, of the village of Allanburg, in the county of Welland and' Province of Ontario, Canada, contractor,

have invented certain new and useful Improvements in the Gonstruction of Dredging- Machine Shovels, which improvements are to construct the said shovel so that it will sink through the water with the least possible rey sistance; and it consists in so constructing the bottom of the shovel that on striking the water the said bottom opens and allows the Water to pass freely through the same.

In the accolnpanying drawings, Figure l is a side view of shovel. Fig. 2 is an inside view of bottom. Fig. 3 is a sectional view through A B. Fig. Il is an outside View of bottom.

Those accustomed to dredging machinery are weilaware of the great loss of time through the speed of the descending shovel being checked when itv strikes the water, and also the injurious effect upon the shovel and other machinery connected therewith caused by the severity and repetition of these blows.

In my improved shovel I construct the bottom so that it will open inwardly immediately it comes in contact with the water, and consequently, as the displacement of the water is, comparatively speaking, ml, the speed of the shovel in descending is not perceptibly affected, nor is the blow as it strikes the water sufficient to do any harm.

In the drawings, A is the body of the shovel, and B the bottom thereof, which latter is hinged in the usual Way, and provided with a latch of the ordinary description. I cut a hole in the bottom B as large as is possible without unduly weakening it. This hole I cover with a plate or duplex bottom, G, hinged, as shown, so as to open inwardly when the shovel strikes the water, thus permitting the water to pass freely through it; but so soon as the shovel stops moving the plate closes, covering the hole, and opening with the bottom B when the contents are to be discharged.

It will thus be seen that drawback chains are not necessary, and that the speed of the shovel descending will not be appreciably affected when it strikes the water.

The advantage of a shovel constructed so that in descending the water will pass freely through it will be particularly noticeable vwhen the dredge is used on a quick-running stream or river.

What I claim as my invention, and desire to secure by Letters Patent, is-

A dredging-machine shovel having its main hinged bottom B provided with a supplemental hinged plate, C, arranged,.as described, so that it will open when it comes in contact with the water, allowing the water to pass freely through the shovel, as set forth. y

JAMES GANAN.

Witnesses: Y

C. E. BLUDoRN, J AMES ARNOLD.

Correction in Letters Patenth No. 218,427.

DEPARTMENT OF THE INTERIOR,

UNITED STATES PATENT OFFICE,

Washington, D. C., September` 25, 1883.

In compliance With the request of the parties in interest, Letters Patent No. 218,427, E granted August 12, 1879, to James Ganan, of Allanburg, Ontario, Canada, for an iinprovement in Dredging-Machine Shovels, is hereby limited so as to expire at the same tinie with Canadian patent No. 9,440, dated December 5, 1878, granted to the saine party.

It is hereby certified that the proper entries and corrections have been made in the iiles and records pertaining to the oase in the Patent Ofoe.

This amendment is made that the United States patent may conform to the provisions of section 4887 of the Revised Statutes.

E. M. MARBLE,

Commissioner of Patents.

Approved H. M. TELLER,

Secretary of the Interior. 

